BENHAM, Justice.

Appellant Isiah Heard and his co-defendant, Morrell Ashford, were convicted of and sentenced for the murder of Jerald Manley and the aggravated assaults of Darrin Burgess and Anthony Cleveland. We affirmed Ashford's convictions in Ashford v. State, 271 Ga. 148 ( 518 S.E.2d 420) (1999).

1. "It is the duty of this court to raise the question of its jurisdiction in all cases in which there may be any doubt as to the existence of such jurisdiction." Rowland v. State, 264 Ga. 872 (1) ( 452 S.E.2d 756) (1995). In the case at bar, there is a question whether appellant filed a timely notice of appeal. Since the timely filing of a notice of appeal is an absolute prerequisite to confer jurisdiction upon the appellate court (id.), we must determine whether the appeal must be dismissed for failure to file a timely notice of appeal. See OCGA § 5-6-48 (b) (1).

OCGA § 5-6-38 (a) states that a notice of appeal "shall be filed within 30 days of the appealable decision or judgment complained of; but when a motion for new trial . . . has been filed, the notice shall be filed within 30 days after the entry of the order granting, overruling, or otherwise finally disposing of the motion." Appellant's July 1999 notice of appeal was not filed within 30 days of the April 1996 judgment of conviction. Appellant filed a motion for new trial, but the trial court never issued an order granting, overruling, or otherwise finally disposing of appellant's motion for new trial. Instead, appellate counsel withdrew his client's motion for new trial by filing a "dismissal" of the motion, and no court order was entered in connection with that action. Compare Bailey v. State, 264 Ga. 300 (n. 1) ( 443 S.E.2d 836) (1994), where the trial court signed the consent order withdrawing the motion for new trial; Ailion v. Wade, 190 Ga. App. 151 ( 378 S.E.2d 507) (1989), where the trial court entered an order withdrawing the motion for new trial at the movant's request.

Our affirmance of a judgment of conviction in a similar procedural posture in Johnson v. State, 263 Ga. 395 ( 435 S.E.2d 195) (1993), may have led appellate counsel to believe it was not necessary to obtain a trial court order disposing of the motion for new trial in order to extend the time for filing a notice of appeal beyond the 30 days immediately following the entry of judgment. In Johnson, we addressed the merits of the appeal despite Justice Carley's dissenting contention that the Court did not have jurisdiction to consider the appeal because the notice of appeal had not been filed timely. Id., at 396. Because we did not rule on this Court's jurisdiction in Johnson, no binding precedent was established. Allen v. State, 219 Ga. 777, 778 ( 135 S.E.2d 885) (1964). See also Douglas v. Wages, 271 Ga. 616, 617 n. 2 ( 523 S.E.2d 330) (1999); Lewis v. Robinson, 254 Ga. 378 ( 329 S.E.2d 498) (1985). We now hold that OCGA § 5-6-38 requires a trial court order granting, denying, or otherwise finally disposing of a party's motion for new trial in order to extend the time for filing a notice of appeal more than 30 days after the entry of judgment. A party's voluntary withdrawal of its motion for new trial, standing alone, is not the statutorily-required court order finally disposing of the motion for new trial. See, e.g., Hall v. State, 213 Ga. App. 242 ( 445 S.E.2d 578) (1994);Marshall v. State, 205 Ga. App. 531 ( 422 S.E.2d 677) (1992); Taylor v. State, 173 Ga. App. 745 ( 327 S.E.2d 860) (1985). In so holding, we must overrule Division 1 of Richards v. State, 247 Ga. App. 345 (1) ( 542 S.E.2d 622) (2000), in which the Court of Appeals relied on our decision in Johnson v. State, supra, and Heard v. State, 210 Ga. App. 805 (1) ( 437 S.E.2d 496) (1993). However, in light of Johnson and the possibility that appellate counsel may have relied on it to withdraw appellant's motion for new trial in an attempt get the appeal docketed in this Court, it would be an injustice to dismiss appellant's appeal for lack of a timely notice of appeal. Accordingly, we will address the merits of the appeal.

2. The District Attorney's motion to dismiss the appeal because appellant's brief was not timely filed is denied. Statutorily, an appeal is not subject to dismissal unless the notice of appeal is not timely filed; the judgment appealed is not a final judgment; or the questions presented by the appeal have become moot. OCGA § 5-6-48 (b) (1-3). The appellate courts will also dismiss an appeal for failure to file a brief and enumeration of errors when the appellant has not complied with an order of the court which outlines the deficiency and sets a date by which the tardy brief must be filed. See, e.g., Mitchell v. State, 214 Ga. App. 69 ( 447 S.E.2d 140) (1994). See also Favors v. State, S94A1234 (decided July 22, 1994). No such order issued in the case at bar.

3. The State presented evidence that appellant and co-defendant Ashford brought a brown briefcase with them when they traveled together from Alabama to Atlanta. They met victim Manley's colleague at a local university and were taken to meet Manley at victim Burgess's residence. When Manley arrived at the residence, he brought a package which several witnesses testified contained plastic bags of cocaine. The witnesses also testified that Ashford shot Manley in the head while Manley struggled to open the locked briefcase appellant and Ashford had brought. Darrin Burgess testified that appellant shot him and shot at Anthony Cleveland as Cleveland fled the scene. When Burgess returned to his home following treatment for his wounds, he found the brown briefcase and its contents: tax forms for Morrell Ashford and a photo of the man, later identified as being Ashford, who Burgess had seen shoot Manley. Co-defendant Ashford was arrested and, a week later, appellant was arrested. Ashford testified that appellant had initiated the trip to Atlanta and that Ashford had found someone to sell cocaine to appellant. Ashford stated that appellant borrowed Ashford's briefcase and refused to let the cocaine sellers see the money purportedly contained in the briefcase until he had the cocaine. The evidence was sufficient to authorize a rational trier of fact to find appellant guilty beyond a reasonable doubt of murder and two counts of aggravated assault. Jackson v. Virginia, 443 U.S. 307 ( 99 S.Ct. 2781, 61 L.Ed.2d 560) (1979).

4. Appellant contends the trial court erred when it failed to strike for cause a venirewoman who purportedly stated she was biased against the use of illegal drugs, having seen their effect on a relative. "Before a juror can be disqualified for cause, it must be shown that an opinion held by the potential juror is so fixed and definite that the juror will not be able to set the opinion aside and decide the case upon the evidence or the court's charge upon the evidence." Garland v. State, 263 Ga. 495 (1) ( 435 S.E.2d 431) (1993). Since the venirewoman told the trial court she would try to put her emotions aside and decide the case on the evidence presented, we cannot say the trial court abused its discretion in failing to remove her for cause. Id.

5. Appellant sees reversible error in the trial court's denial of his motion to sever his trial from that of his co-defendant. Appellant maintains he and his co-defendant had mutually exclusive, irreconcilable, and antagonistic defenses, with appellant contending he was not present at the shootings and his co-defendant testifying that appellant was the active mastermind of a plan to steal illegal drugs by agreeing to purchase the drugs and then not paying for them. Whether to try separately or jointly defendants who are jointly indicted for a non-capital felony is a matter for the trial court's discretion (OCGA § 17-8-4), and this Court will not find error in the denial of a motion to sever absent an abuse of discretion. Davis v. State, 266 Ga. 801 (3) ( 471 S.E.2d 191) (1996). The existence of antagonistic defenses is not enough to require severance — harm due to the failure to sever must be shown. Dennard v. State, 263 Ga. 453 (5) ( 435 S.E.2d 26) (1993). Appellant sees harm in the fact that his co-defendant was permitted to give hearsay testimony, thereby depriving appellant of his right to confront witnesses, and to place appellant's character in issue by depicting appellant as a cocaine distributor. However, appellant has not shown the necessary clear prejudice since, even if the motion to sever had been granted, the co-defendant could have given the same testimony at appellant's separate trial. Kennedy v. State, 253 Ga. 132 (2) ( 317 S.E.2d 822) (1984).

6. Appellant next argues that the trial court committed reversible error by permitting the co-defendant to give hearsay testimony by testifying that his cousin had told him, in appellant's presence, that appellant wanted to know if the co-defendant could get cocaine for appellant. Even assuming the testimony constituted inadmissible hearsay, its admission does not constitute reversible error unless appellant suffered harm.McKenzie v. State, 271 Ga. 47 (2) ( 518 S.E.2d 404) (1999). In light of the overwhelming evidence of appellant's guilty involvement in the murder and aggravated assaults, including eyewitness and accomplice testimony, we conclude that it is highly probable that the admission of the co-defendant's contested testimony did not contribute to the verdict. See Wright v. State, 226 Ga. App. 499 (2) ( 486 S.E.2d 711) (1997). Accordingly, even if the admission of the testimony was erroneous, it was not harmful error.

7. Lastly, appellant complains the trial court erroneously failed to instruct the jury sua sponte on the statutory definition of hearsay with respect to the co-defendant's testimony. He acknowledges the trial court defined hearsay for the jury with regard to a police officer's testimony. The failure of the trial court to give the jury instruction appellant contends was necessary cannot be reversible error in the absence of a written request to so charge. See Floyd v. State, 272 Ga. 65 (6) ( 525 S.E.2d 683) (2000).

Judgment affirmed. All the Justices concur.

BENHAM, Justice.

DECIDED SEPTEMBER 17, 2001.